I don't really use any of those. I'm a fuck off, you arsehole, kinda gal.
I think you have to give people a chance.
My yardstick is resentment, as soon as I feel resentful that someone is taking a lot more than they are giving, I have no qualms in finishing a relationship, and once finished, that's it.
Yep. One might not say fuck off you arsehole and don't come back but one certainly thinks it.